| article html file updated | 9 February 2020 01:21 CET | Update | https://www.mdpi.com/1424-8220/18/1/54 |
| article html file updated | 29 September 2019 12:34 CEST | Update | N/A |
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| article html file updated | 27 December 2017 13:41 CET | Original file | N/A |
| article xml uploaded. | 27 December 2017 13:40 CET | Update | https://www.mdpi.com/1424-8220/18/1/54/xml |
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| article pdf uploaded. | 27 December 2017 13:40 CET | Version of Record | https://www.mdpi.com/1424-8220/18/1/54/pdf |